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Fixes for unpacking raw packets

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This commit is contained in:
Erik Ekman 2009-08-15 21:46:31 +00:00
parent 2212ceadd5
commit 8233636650
1 changed files with 4 additions and 2 deletions
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6
src/iodine.c
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@ -249,7 +249,6 @@ read_dns(int dns_fd, int tun_fd, char *buf, int buflen) /* FIXME: tun_fd needed
} else { /* CONN_RAW_UDP */ } else { /* CONN_RAW_UDP */
unsigned long datalen; unsigned long datalen;
char buf[64*1024]; char buf[64*1024];
int raw_user;
/* minimum length */ /* minimum length */
if (r < RAW_HDR_LEN) return 0; if (r < RAW_HDR_LEN) return 0;
@ -257,8 +256,11 @@ read_dns(int dns_fd, int tun_fd, char *buf, int buflen) /* FIXME: tun_fd needed
if (memcmp(data, raw_header, RAW_HDR_IDENT_LEN)) return 0; if (memcmp(data, raw_header, RAW_HDR_IDENT_LEN)) return 0;
/* should be data packet */ /* should be data packet */
if (RAW_HDR_GET_CMD(data) != RAW_HDR_CMD_DATA) return 0; if (RAW_HDR_GET_CMD(data) != RAW_HDR_CMD_DATA) return 0;
/* should be my user id */
if (RAW_HDR_GET_USR(data) != userid) return 0;
raw_user = RAW_HDR_GET_USR(data); r -= RAW_HDR_LEN;
datalen = sizeof(buf);
if (uncompress((uint8_t*)buf, &datalen, (uint8_t*) &data[RAW_HDR_LEN], r) == Z_OK) { if (uncompress((uint8_t*)buf, &datalen, (uint8_t*) &data[RAW_HDR_LEN], r) == Z_OK) {
write_tun(tun_fd, buf, datalen); write_tun(tun_fd, buf, datalen);
} }